I checked it on Chrome. Also not working.I checked my localhost version of webGL. It worked fine.I downsized my images a bit (from 4000x3000 to 2000x1500) still nothing. Since I've changed their extension to jpg they had smaller filesize than background I have before update and that background loaded every time, so it's not file size issue.I downsized my images to 800x600 which is my webGL version of game resolution and... 4 of 5 images loads correctly (A does not load. This is the version that is currently on my page. A file does not have the biggest file size of 5 pictures.)

I have no idea what I'm doing wrong. Is there a reason why I'm getting those 403 errors?